Der Hinweis in der genannten Datei brachte nix? (siehe unten)
Oder geht das nicht wg. beschädigter Installation? Sollte erzwingbar
sein.
ntop admin password need to be set:
===================================
When ntop is installed for the first time, you should be asked for a
password to
set as admin password for ntop. However, if it is not possible to
interact with

the user during installation, a random password will be set, in order
to

rotect
from unauthorized access.

In the last case, if you want to access admin functionalities, you
need

to set a
new password by reconfiguring the ntop package:
# dpkg-reconfigure -plow ntop